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Usually, under the word computer 3D model, we imagine a system block of a PC and maybe with the monitor. Basically, a computer is a device or system capable of performing a given, well-defined, changeable sequence of operations. These are most often the operations of numerical calculations and data manipulation, but this also includes input-output operations. The description of the sequence of operations is called a program.
A computer system is any device or group of interconnected or adjacent devices, one or more of which, acting in accordance with the program, performs automated data processing.
After the invention of the integrated circuit, the development of computer technology has accelerated sharply. This empirical fact, seen in 1965 by Intel co-founder Gordon E. Moore, was named after him by Moore’s Law. The process of miniaturization of computers is also developing rapidly. The first electronic computers (for example, such as ENIAC, created in 1946) were huge devices, weighing tons, occupying entire rooms and requiring a large number of service personnel for successful operation. They were so expensive that only governments and large research organizations could afford them, and they seemed so exotic that it seemed as if a small handful of such systems could satisfy any future needs. In contrast to this, modern computers — much more powerful and compact and much less expensive — have become truly ubiquitous.
Modern computers use the whole range of design solutions developed throughout the development of computing technology. These solutions, as a rule, do not depend on the physical implementation of computers but are themselves the basis upon which developers rely.
Modern supercomputers are used for computer modeling of complex physical, biological, meteorological and other processes and solving applied problems. For example, to simulate nuclear reactions or climate change. Some projects are carried out with the help of distributed computing, when a large number of relatively weak computers simultaneously work on small parts of a common task, thus forming a very powerful computer.